Biom hike allows you to experience the sensation of the outdoors in every step whilst still providing the necessary support for the toughest terrain the rugged rubber outsole provides aggressive traction while the external flexible heel counter offers extensive support so there are no limits on even the most uneven surfaces anatomical fit with forefoot flex for full on comfort 3 layer cambrelle insole for maximum moisture absorption gore texreg 100 waterproof lining keeps feet cozy and co